How many significant figures are in answer of (4.85/403859) + 1.00098

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils

What is a difference between a mixture of elements and a mixture of compounds

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.